改性粉煤灰用于水体和土壤重金属污染修复研究

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中图分类号：TQ424；X505 文献标志码：A 文章编号：1672-2043（2025）10-2676-09 doi：10.11654/jaes.2024-0871

Abstract：Heavymetalcontaminationisoneofthemajor waterandsoilenvironmental problems，andthisstudyaimedtodevelop adsorbentsandpassvatorsfomflyashfortheremediationofhavymetalpolutioninwaterandsoil.Thematerialpreparationmethods includedsucsietreatoflhitciddsetopreaescalledcibsreatedflstramntoffshiaeto prepareo-aledstreatedshdprepaaofeostrucedflyshyractinglFendSpecifroflholl bycondensationreaction.Modifiedflyashhadsignificantlyhancedporosityandmoreactivesites.Theadsorptiveremovalfciencyof Cdin waterandthepassivationeficiencyofCdinsoilweresignificantlyimprovedbyacid-base-treatedflyashandbasetreatedone comparedwiththepristineflyshInthepasivationremediationincubationexperimentofCd-contamiatedsoil，ase-treatedflyash achieved a decrease of about 24% in the fraction of exchangeable Cd in soil within 7 days.In contrast，reconstructed fly ash had the characteristics of a solid acid， which led to a decrease in the pH of the soil and an inverse increase in the fraction of exchangeable Cd by about 23% .The useofflyashforpolutionremediationafteralow-cost reatmentholds promiseforits mass consumptionandresourcing.

Keywords：remediation of contaminated soil; flyash; solid waste;heavy metal; passivator

农田土壤重金属污染不仅会对农作物的生长产生较大的威胁，而且重金属还能被植物吸收，并随着食物链的不断富集，严重危害人类的生命健康。（剩余17162字）